Will likely go for the 6 in gold and 64GB (my 16GB 5S is starting to struggle).
I have a HTC One M8 at the mo as a work phone, and while I like the extra screen real-estate, I do find it a bit heavy and not particularly comfortable in the hand. I'm constantly having to re-adjust my grip with it.
Other key features of the + aren't that applicable to me, either. The OIS is nice, but I only tend to take pictures of my son, so the standard camera suffices.
And while the battery performs better overall, it's key areas are those that I don't care about: audio - I don't keep audio tracks on my device, 3G talk time - I rarely use the phone and when I do it's over FaceTime 99% of the time, and standby - my phone is plugged in at work and at home, so while the overall battery life isn't all that great, I don't encounter too many problems as it's generally always connected to a laptop or power outlet.